TWI472977B - Touch panel and manufacturing method - Google Patents

Description

Touch panel and method of manufacturing same

The invention provides a touch panel, and provides a touch panel capable of increasing a visible area and a manufacturing method thereof.

In today's market for consumer electronics products, portable electronic products such as personal digital assistants (PDAs), mobile phones, notebooks, and tablet PCs have been widely used. A touch panel is used as an interface tool for data communication. In addition, since the design of electronic products is currently in the direction of light, thin, short and small, there is not enough space on the product to accommodate traditional input devices such as keyboards and mice, especially in the demand for tablet PCs that are designed with humanity in mind. Next, touch panels have become one of the key components. In addition to the multi-level menu design requirements, the touch panel can also have the functions of keyboard, mouse and other humanized operation modes, especially the integration of input and output in the same interface (screen). The traits are beyond the reach of other traditional input devices.

Currently, in the design of the touch panel, in order to transmit the sensing signal, The edge of the display area or the visible area is usually surrounded by the peripheral line (metal lead) to transmit the touch signal of the display area or the visible area to the golden finger Pad, and then electrically connected to the motherboard through the flexible circuit board FPC. PCB.

However, in the development process of the foregoing touch panel, the requirements for design and product aesthetics are becoming stricter, and in order to shield the wires of the wiring area, the conventional technology is to cover the lens and print the patterned shielding layer. (or shading layer) to shield the surrounding lines. However, this method not only increases the production work when printing the shielding layer. The cost of the sequence, and after printing the shielding layer, the flatness is prone to drop, which is prone to disconnection or poor electrical conduction when the subsequent sensing lines are fabricated and connected. Loss, and the jumper wires cause the yield to be difficult to control and increase the reliability risk.

The purpose of the present invention is to provide a touch panel structure, which has the characteristics of simple structure and increased range of visible area.

To achieve the above object, the touch panel structure of the present invention comprises a display unit, and a polarizing plate is disposed on the display unit. The complex sense series is located on the polarizing plate. The plurality of peripheral lines are located on the polarizing plate and are electrically connected to the plurality of sensing series. The utility model further comprises an outer frame for fixing the periphery of the display unit and the polarizing plate and shielding the peripheral circuit. In order to achieve a visual effect of increasing the visible area. And the material and design of the outer frame can be supplemented by the change of design aesthetics, thereby improving the design texture of the overall touch panel.

The invention provides a touch panel, and provides a touch panel capable of increasing a visible area and a manufacturing method thereof.

To achieve the above objective, the touch panel of the present invention comprises a touch panel comprising: a display unit and a polarizing plate disposed on the display unit. The plurality of sensing series is located on the polarizing plate and the plurality of peripheral lines, and is located on the polarizing plate, and is electrically connected to the plurality of sensing series.

In order to achieve the above object, the touch panel of the present invention further includes an outer frame, a periphery of the display unit and the polarizing plate, and shields a plurality of peripheral lines.

In order to achieve the above object, the touch panel of the present invention further includes an adhesive layer between the polarizing plate and the display unit.

To achieve the above objective, the touch panel of the present invention, wherein the plurality of sensing series further comprises a plurality of first direction series and a plurality of second direction series interlaced.

In order to achieve the above object, the touch panel of the present invention further includes a transparent protective substrate disposed on the polarizing plate.

In order to achieve the above object, a method of manufacturing a touch panel of the present invention comprises: providing a polarizing plate to form a transparent conductive layer and a metal layer on the polarizing plate. The transparent conductive layer and the metal layer are patterned to form a plurality of sensing series and a plurality of peripheral lines electrically connected to each other. The polarizing plate is attached to the display unit.

In order to achieve the above object, a method of manufacturing a touch panel of the present invention comprises: providing a polarizing plate to form a transparent conductive layer on the polarizing plate. The transparent conductive layer is patterned to form a complex sensing series. The plurality of peripheral lines are printed on the polarizing plate to electrically connect the peripheral lines and the plurality of sensing series. The polarizing plate is attached to the display unit.

In order to achieve the above object, the method for manufacturing a touch panel of the present invention further includes providing an outer frame, fixing a periphery of the display unit and the polarizing plate, and shielding the peripheral circuit.

In order to achieve the above object, a method for manufacturing a touch panel of the present invention, wherein a complex sense series is formed, further comprising forming a plurality of first direction series and a plurality The second direction is interlaced with each other.

In order to achieve the above object, a method of manufacturing a touch panel of the present invention The transparent conductive layer and the metal layer are formed on the polarizing plate by a roll-to-roll coating process or a roll-to-roll coating process.

A method of manufacturing a touch panel of the present invention for achieving the above object. Wherein, the patterned transparent conductive layer or the metal layer is a roll-to-roll yellow light process and a roll-to-roll laser etching process.

In order to achieve the above object, a method of manufacturing a touch panel of the present invention The method further includes disposing a transparent protective substrate on the polarizing plate.

FIG. 1a is a schematic view of a touch panel according to an embodiment of the present invention. First, the touch panel of the present invention includes a display unit 100, which may be, for example, a liquid crystal display module or an AMOLED. The polarizing plate 120 is disposed on the display unit 100, and the polarization effect is polarized by the polarizing plate 120 to control the display effect. The complex sensing series 141 and the plurality of peripheral lines 142 are located on the lower surface of the polarizing plate 120. The plurality of sensing series 141 are electrically connected to the plurality of peripheral lines 142, respectively. The complex sense series 141, for example, can include a plurality of first direction series and a plurality of second direction series interleaved and electrically insulated from each other. The prior art may be, for example, a method of using a bridge wire, bridging a wire, adding an insulating member, or designing a conductive bridge. Or the plurality of sensing series 141 is a plurality of first direction series, and touch sensing can be performed. An embodiment of the present invention further includes an outer frame 130 (see FIG. 1b) for fixing the periphery of the display unit 100 and the polarizing plate 120, and shielding the plurality of peripheral lines 142 so that the plurality of peripheral lines 142 are not exposed. It can provide a good appearance display effect and make the touch panel thinner and lighter. In an embodiment of the present invention, the polarizing plate 120 and the display unit 100 further include an adhesive layer 160 for completely adhering the polarizing plate 120 and the display unit 100. The material of the adhesive layer 160 may be an optical glue, a water glue or a combination thereof.

FIG. 2a is a schematic diagram of a touch panel according to an embodiment of the present invention. The touch panel of the present invention includes a display unit 200, which may be, for example, a liquid crystal display module or an AMOLED. The polarizing plate 220 is disposed on the display unit 200, and the polarization effect of the polarizing plate 220 can control the display effect. The complex sensing series 241 and the plurality of peripheral lines 242 are located on the lower surface of the polarizing plate 220. The plurality of sensing series 241 are electrically connected to the plurality of peripheral lines 242, respectively. The complex sense series 241 further includes a plurality of first direction series and a plurality of second direction series interlaced and electrically insulated from each other. The prior art may be, for example, a method of using a bridge wire, bridging a wire, adding an insulating member, or designing a conductive bridge. Transparent protective substrate 250, The material of the transparent protective substrate 250 is, for example, glass, tempered glass, PC, PMMA or a composite of PC and PMMA, and is used as a cover lens of the outer layer of the liquid crystal panel. An embodiment of the present invention further includes an outer frame 230 (see FIG. 2b) for fixing the periphery of the display unit 200, the polarizing plate 220, and the transparent protective substrate 250, and shielding the plurality of peripheral lines 242 to make the plurality of peripherals Line 242 is not exposed. It can provide a good appearance display effect and make the touch panel thinner and lighter.

In one embodiment of the present invention (see FIGS. 2c to 2d), the plurality of sensing series 241 and the plurality of peripheral lines 242 as described above may be located on the upper surface or the lower surface of the polarizing plate 220. The plurality of sensing series 241 are electrically connected to the plurality of peripheral lines 242, respectively. The complex sense series 241 further includes a plurality of first direction series and a plurality of second direction series interlaced and electrically insulated from each other. For example, the plurality of first direction strings may be located on the upper surface of the polarizing plate 220, and the plurality of second direction strings may be located on the lower surface of the polarizing plate 220. Or the plurality of first direction series and the plural second direction series are simultaneously located on the upper surface or the lower surface of the polarizing plate 220. The prior art may be, for example, a method of using a bridge wire, bridging a wire, adding an insulating member, or designing a conductive bridge.

The method for manufacturing a touch panel according to an embodiment of the present invention includes forming a transparent conductive layer 310 and a metal layer 370 on the polarizing plate 320 in sequence. The manner in which the transparent conductive layer 310 and the metal layer 370 are formed may be, for example, a roll-to-roll physical vapor deposition (PVD), a roll-to-roll chemical vapor deposition (CVD), a roll-to-roll plating, a roll-to-roll coating process, or the like. The transparent conductive layer may be, for example, a metal oxide, a nano silver wire or a nano conductive metal, and the metal oxide may be, for example, indium tin oxide (ITO), indium zinc oxide (IZO), oxidation. Cadmium tin oxide (CTO), aluminum zine oxide (AZO), indium tin zinc oxide (ITZO), zinc oxide, cadmium oxide, cerium oxide (hafnium oxide, HfO), indium gallium zinc oxide (InGaZnO), oxidation Indium gallium zinc magnesium oxide (InGaZnMgO), indium gallium magnesium oxide (InGaMgO) or indium gallium aluminum oxide (InGaAlO). The metal layer can be, for example, at least one layer of conductive metal or a plurality of layers of conductive metal. The material may be a conductive metal or a conductive alloy such as a copper alloy, an aluminum alloy, gold, silver, aluminum, copper or molybdenum. The structure of the multi-layer conductive metal layer may be, for example, a stacked structure of a molybdenum layer/aluminum layer/molybdenum layer, or may be a conductive metal or a conductive alloy selected from the group consisting of copper alloy, aluminum alloy, gold, silver, aluminum, copper, molybdenum, and the like. A multi-layer conductive metal layer structure stacked with a plurality of materials. A roll-to-roll yellow process or a roll-to-roll laser process is performed to form a complex sense series 341 and a plurality of peripheral lines 342. The plurality of sensing series 341 and the plurality of peripheral lines 342 are located on a lower surface of the polarizing plate 320, wherein the plurality of sensing series 341 may include, for example, a plurality of first direction series and a plurality of second direction series interlaced and electrically insulated from each other, The prior art may be, for example, a method of using a bridge wire, bridging a wire, adding an insulating member, or designing a conductive bridge. The complex sense series 341 can also be interleaved and electrically insulated from each other, for example, by a plurality of first direction series and a plurality of second direction series. For example, the plurality of first direction strings may be located on the upper surface of the polarizing plate 320, and the plurality of second direction strings may be located on the lower surface of the polarizing plate 320. Or the plurality of first direction series and the plural second direction series are simultaneously located on the upper surface or the lower surface of the polarizing plate 320. Then, the first adhesive layer 360 and the polarizing plate 320 are adhered by roll-to-roll bonding or sheet bonding. The first adhesive layer 360 can be, for example, an optical glue, a water glue or a combination thereof. Then, it is cut by a die cutting or a laser cutting method to form a chip-shaped touch sensing element 301 (see FIG. 3g). Then, the polarizing plate 320 having the touch sensing element 301 is adhered to the display unit 300 by the second adhesive layer 361. In an embodiment of the present invention (see FIG. 3d), the method further includes providing the outer frame 330 to fix the periphery of the structure, so that the polarizing plate 320 and the display unit 300 are firmly fixed, and the outer frame 330 shields the plurality of peripheral lines 342. The metallic bright surface of the plurality of peripheral lines 342 is exposed to provide an excellent appearance display effect. At the same time, the above structure can make the touch panel thinner and lighter. The display unit 300 can be, for example, a liquid crystal display module or an AMOLED.

In the embodiments described above, after the polarizing plate 320 is pasted on the display unit 300, the transparent protective substrate 350 is further disposed on the polarizing plate 320 (see FIG. 3e), and the transparent protective substrate 350 is made of a material. For example, it may be glass, tempered glass, PC, PMMA or a composite of PC and PMMA as a cover lens.

As shown in FIG. 4a to FIG. 4g, the method for manufacturing a touch panel according to an embodiment of the present invention includes: forming a transparent conductive layer 410 on the polarizing plate 420. The manner in which the transparent conductive layer 410 is formed may be, for example, roll-to-roll physical vapor deposition (PVD), roll-to-roll chemical vapor deposition (CVD), roll-to-roll plating, roll-to-roll coating process, and the like. The transparent conductive layer may be, for example, a metal oxide, a nano silver wire or a nano conductive metal, and the metal oxide may be, for example, indium tin oxide (ITO), indium zinc oxide (IZO), oxidation. Cadmium tin oxide (CTO), aluminum zinc oxide (AZO), indium tin zinc oxide (ITZO), zinc oxide, cadmium oxide, cerium oxide (hafnium oxide, HfO), indium gallium zinc oxide (InGaZnO), indium gallium zinc magnesium oxide (InGaZnMgO), indium gallium magnesium oxide (InGaMgO) or indium oxide Indium gallium aluminum oxide (InGaAlO), etc.). Next, a roll-to-roll yellow process or a roll-to-roll laser process is performed to pattern the transparent conductive layer 410 to form a complex sense series 441. The plurality of sensing series 441 may include, for example, a plurality of first direction series and a plurality of second direction series interlaced and electrically insulated from each other. In the prior art, for example, a bridge wire, a jumper wire, an insulating element may be added, or Design conductive bridges, etc. The complex sense series 441 can also be interleaved and electrically insulated from each other, for example, by a plurality of first direction series and a plurality of second direction series. For example, the plurality of first direction strings may be located on the upper surface of the polarizing plate 420, and the plurality of second direction strings may be located on the lower surface of the polarizing plate 420. Or the plurality of first direction series and the plural second direction series are simultaneously located on the upper surface or the lower surface of the polarizing plate 420. (See Figure 4e). The complex sense series 441 can also be, for example, a plurality of first direction strings. Next, the plurality of peripheral lines 442 are printed on the polarizing plate 420, and the plurality of peripheral lines 442 and the plurality of sensing series 441 are electrically connected to each other. Among them, printed The method of brushing the peripheral line 442 may be, for example, inkjet printing technology, screen printing, precision coating printing, letterpress printing. The polarizing plate 420 is attached to the display unit 400. Then, the first adhesive layer 460 and the polarizing plate 420 are adhered by roll-to-roll bonding or sheet bonding. The first adhesive layer 460 can be, for example, an optical glue, a water glue or a combination thereof. Then, it is cut by a die cutting or a laser cutting method to form a chip-shaped touch sensing element 401 (see FIG. 4g). Then, the polarizing plate 420 having the touch sensing element 401 is adhered to the display unit 400 by the second adhesive layer 461. In an embodiment of the present invention (see FIG. 4d), the method further includes providing the outer frame 430 to fix the periphery of the structure, so that the polarizing plate 420 and the display unit 400 are firmly fixed, and the outer frame 430 shields the plurality of peripheral lines 442, The exposed metal surface of the plurality of peripheral lines 442 is exposed to provide an excellent appearance. At the same time, the above structure can make the touch panel thinner and lighter. The display unit 400 can be, for example, a liquid crystal display module or an AMOLED.

In the above method for manufacturing a touch panel, a method of forming a transparent conductive layer and a metal layer on a polarizing plate is a roll-to-roll coating process or a roll-to-roll coating process. Wherein, the prior art of the above preparation method can be, for example, by sputtering, evaporation, vacuum ion plating, electroplating, physical vapor deposition (PVD), chemical vapor deposition (CVD) or spin coating process, slit coating A transparent conductive layer is formed on the surface of the polarizing plate by a process or the like.

In each of the embodiments, after the polarizing plate 420 is attached to the display unit 400, the transparent protective substrate 450 is further disposed on the polarizing plate 420. The transparent protective substrate 450 may be made of glass or tempered glass. , PC, PMMA or a composite of PC and PMMA as a cover lens. The first adhesive layer 460 and the polarizing plate 420 are adhered to the roll-to-roll or sheet-fitting manner. The first adhesive layer 460 can be, for example, an optical glue, a water glue or a combination thereof.

Although the present invention has been disclosed above by way of example, it is not intended to limit the invention. Anyone skilled in the art, without departing from the spirit and scope of the invention, A few changes and modifications may be made, and the scope of protection of the present invention is defined by the scope of the patent application.

100,200,300,400‧‧‧ display unit

120,220,320,420‧‧‧ polarizing plate

130,230,330,430‧‧‧ frame

141,241,341,441‧‧‧Multiple sense series

142,242,342,442‧‧‧Multiple peripheral lines

250,350,450‧‧‧Transparent protective substrate

310,410‧‧‧Transparent conductive layer

370‧‧‧metal layer

160,260‧‧‧Adhesive layer

360, 460‧‧‧ first adhesive layer

361,461‧‧‧second adhesive layer

301,401‧‧‧Touch sensing components

1a to 1b are schematic views showing the structure of an embodiment of the touch panel of the present invention.

2a to 2b are schematic views showing the structure of an embodiment of the touch panel of the present invention.

2c to 2d are schematic views showing the structure of an embodiment of the touch panel of the present invention.

3a to 3g are schematic views showing the structure of an embodiment of the touch panel of the present invention.

4a to 4g are schematic views showing the structure of an embodiment of the touch panel of the present invention.

200‧‧‧ display unit

220‧‧‧Polar plate

230‧‧‧Front frame

241‧‧‧Multiple sense series

242‧‧‧Multiple peripheral lines

250‧‧‧Transparent protective substrate

260‧‧‧Adhesive layer

Claims (12)

A touch panel includes: a display unit; a polarizing plate attached to the display unit; a plurality of sensing series directly formed on the polarizing plate; and a plurality of peripheral lines located on the polarizing plate Electrically connected to the sensing series. The touch panel of claim 1, further comprising an outer frame for fixing the display unit and the periphery of the polarizing plate and shielding the peripheral lines. The touch panel of claim 1, wherein the polarizing plate further comprises an adhesive layer between the polarizing plate and the display unit. The touch panel of claim 1, wherein the sensing series further comprises a plurality of first direction series and a plurality of second direction series interlaced. The touch panel of any one of claims 1 to 4, further comprising a transparent protective substrate disposed on the polarizing plate. A method for manufacturing a touch panel, comprising: providing a polarizing plate; forming a transparent conductive layer and a metal layer on the polarizing plate; patterning the transparent conductive layer and the metal layer to form a plurality of sensing series and a plurality of peripheral portions The wires are electrically connected to each other; and the polarizing plate is attached to a display unit. A manufacturing method of a touch panel, comprising: providing a polarizing plate; Forming a transparent conductive layer on the polarizing plate; patterning the transparent conductive layer to form a plurality of sensing series; printing a plurality of peripheral lines on the polarizing plate to electrically connect the peripheral lines and the sensing series; And attaching the polarizing plate to a display unit. The method for manufacturing a touch panel according to claim 6 or claim 7, further comprising providing an outer frame, fixing the display unit and the periphery of the polarizing plate, and shielding the peripheral lines. The method of manufacturing a touch panel according to claim 6 or 7, wherein the sensing series is formed, and further comprising forming a plurality of first direction series and a plurality of second direction series interlaced. The method for manufacturing a touch panel according to claim 6 or 7, wherein the transparent conductive layer and the metal layer are formed on the polarizing plate by a roll-to-roll coating process or a roll-to-roll coating process. The method for manufacturing a touch panel according to claim 6 or 7, wherein the transparent conductive layer or the metal layer is patterned by a roll-to-roll yellow process or a roll-to-roll laser etching process. The method for manufacturing a touch panel according to claim 6 or 7, further comprising: providing a transparent protective substrate on the polarizing plate.